JP6097436B1 - Oiling device and method - Google Patents

Abstract

An oil application apparatus and an oil application method capable of applying a predetermined amount of oil in a short time. An oil coating apparatus 100 injects oil from a nozzle head. The pump 15 feeds oil from an oil tank 17 that stores oil, and the pump 15 is driven to supply oil from the oil tank 17 to the nozzle head. The servo motor 13 and a control device 51 that controls the drive of the servo motor 13 are provided. The control device 51 is an oil application device 100 that controls the servo motor 13 so that the rotation angle of the pump 15 is set to a predetermined amount of oil supplied to the nozzle head, and the oil supply time is a predetermined time. [Selection] Figure 1

Description

  The present invention relates to an oil application apparatus for applying an oil-based liquid and an oil application method.

  As a technique for applying an oil-based liquid (hereinafter referred to as “oil”) such as a lubricating oil, a release oil, or a food oil to the surface of an oil-coated body such as a workpiece, for example, one disclosed in Patent Document 1 is disclosed. Are known. Patent Document 1 describes that oil is supplied to a nozzle via an electromagnetic valve, and a negative charge of a high voltage (for example, about 30,000 volts) is applied to inject the oil.

  In recent years, it is desired to process a large amount of workpieces in a short time when processing the workpiece. For example, it is necessary to apply oil to the workpiece in a short time of about 0.3 to 0.5 seconds. However, in the conventional system, since the oil is injected by controlling the opening and closing of the solenoid valve provided between the oil tank and the nozzle, the opening and closing control is not in time in a short time of about 0.3 to 0.5. There is a problem that it is difficult to apply a predetermined amount of oil.

JP 2006-297309 A

  As described above, the conventional oiling device has a problem that it cannot apply a predetermined amount of oil in a short time because the oiling is controlled by opening and closing the electromagnetic valve.

  The present invention has been made to solve such conventional problems, and an object of the present invention is to provide an oil application device capable of applying a predetermined amount of oil in a short time, and oil application It is to provide a method.

In order to achieve the above object, the oil coating apparatus according to the present invention repeatedly ejects the oil-based liquid by repeating the injection time zone in which the oil-based liquid is ejected from the nozzle head and the stop time zone in which the ejection is stopped. In the oil coating apparatus, from a reservoir that stores the oil-based liquid, a pump that sends the oil-based liquid, a drive motor that drives the pump and supplies the oil-based liquid in the reservoir to the nozzle head, and A control unit that controls driving of the drive motor, the control unit sets a rotation angle and a rotation speed of the pump based on an oil application amount and an oil application time of the oil-based liquid, and the stop time The drive motor is stopped in the belt, and the drive motor is controlled to rotate at the set rotation speed and the set rotation angle in the injection time zone .

An oil coating method according to the present invention is an oil coating method in which an oil-based liquid is intermittently ejected by repeating an injection time zone in which oil-based liquid is ejected from a nozzle head and a stop time zone in which injection is stopped. Supplying the oil-based liquid driven and stored in the storage unit to the nozzle head; stopping the pump during the stop time period; and a preset rotation speed during the injection time period; and And a step of controlling the driving of the pump so as to rotate by a preset rotation angle .

  According to the present invention, since a predetermined amount of oil-based liquid can be supplied to the nozzle head in a predetermined time, it is possible to reliably inject oil and apply oil to the workpiece even in a short time.

FIG. 1 is a configuration diagram showing an outline of an oil coating apparatus according to an embodiment of the present invention. FIG. 2 is an explanatory view showing a detailed configuration of the nozzle of the oil coating apparatus according to the embodiment of the present invention. FIG. 3 is an explanatory view showing a detailed configuration of a shim of an oil coating apparatus according to an embodiment of the present invention, where (a) is a front view, (b) is a side view, and (c) is AA ′. It is sectional drawing. FIG. 4 is an explanatory diagram of the rotation angle of the pump. FIGS. 5A and 5B are explanatory diagrams showing the oiling area of the workpiece. FIG. 5A shows the case where the oiling start position is reached, and FIG. 5B shows the case where the oiling end position is reached. FIG. 6 is a diagram showing a specific example of the rotation angle and rotation speed of the pump. FIG. 7 is a flowchart showing a processing procedure of the oil coating apparatus according to the embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view schematically showing a configuration of a coating apparatus according to an embodiment of the present invention, and FIG. 2 is a view of the nozzle 5 shown in FIG.

  As shown in FIG. 1, the oil coating apparatus 100 according to the present embodiment includes a nozzle 5 that injects oil (oil-based liquid) toward a workpiece 3 placed on a transport table 61. As shown in FIG. 2, the nozzle 5 has a nozzle head 27 in which two plate members 27a and 27b are arranged to face each other. A slit 23 is formed between the plate members 27 a and 27 b, and a shim 25 is provided inside the slit 23.

  3A and 3B are explanatory views showing the configuration of the shim 25, where FIG. 3A is a front view (viewed from the direction of the arrow Y1 in FIG. 2), FIG. 3B is a side view, and FIG. It is AA 'sectional drawing. As shown in FIG. 3, the shim 25 has a rectangular shape as a whole, and oil sumps 31 a and 31 b that are notched in a pentagonal shape are formed therein. That is, as shown in FIG. 3B, the oil reservoirs 31a and 31b are formed thinner than the other portions. Accordingly, as shown in FIG. 3C, the bottoms of the oil reservoirs 31a and 31b are openings 7a and 7b having an opening width d1. A thick portion 39 is formed between the oil reservoirs 31a and 31b to divide the oil reservoirs 31a and 31b. In FIG. 2, only two notches 31a and 31b are shown.

  The nozzle head 27 is made of an insulator, and the shim 25 is made of a conductor such as a stainless steel sheet. The shim 25 is connected to a power connector 45 (see FIG. 2). As will be described later, when oil is supplied to the oil reservoirs 31a and 31b, the oil is injected from the openings 7a and 7b, and the oil is then applied to the workpiece 3 shown in FIGS. Can do. Further, the oil sumps 31a and 31b are provided with projections 33a and 33b for preventing warpage.

  As shown in FIG. 1, the oil coating apparatus 100 according to the present embodiment includes an oil tank 17 (storage section) that stores oil, and a pump 15 that sends oil stored in the oil tank 17 to the nozzle 5. And a servo motor 13 (drive motor) for controlling the rotation of the pump 15 and a control device 51.

  The output port of the pump 15 is connected to the manifold 42 via the oil pipe 9a. The manifold 42 includes a plurality of discharge ports, and each discharge port is connected to the nozzle 5 via the electromagnetic valve 11 (13 in the figure). Specifically, as shown in FIG. 2, a supply port 29 provided in the nozzle head 27 is connected to the oil sumps 31 a and 31 b shown in FIG. 3. Therefore, by opening the solenoid valve 11, oil can be supplied to the oil sumps 31a and 31b.

  Further, the discharge port of the manifold 42 is connected to the oil tank 17 via a circulation electromagnetic valve 44 and an oil pipe 9b. Therefore, the excess oil in the manifold 42 can be returned to the oil tank 17 by opening the circulation solenoid valve 44. The circulation solenoid valve 44 is necessary in the case of oil having a high viscosity, but is not required in the case of oil having a low viscosity.

  The control device 51 controls the voltage control unit 511 that applies a negative high voltage to the shim 25 from the power connector 45 (see FIG. 2) provided on the nozzle 5, and the opening and closing of each solenoid valve 11 and the circulation solenoid valve 44. And a motor control unit 513 for controlling the servo motor 13. The control device 51 is connected to a power source 49 and supplied with power. In addition, the control apparatus 51 can be comprised as an integrated computer which consists of memory | storage means, such as central processing unit (CPU), RAM, ROM, a hard disk, for example.

  The voltage control unit 511 is connected to a power connector 45 provided on the nozzle 5. By applying a negative high voltage to the power connector 45, the shim 25 can be set to a negative voltage. Therefore, the oil supplied to the oil sumps 31a and 31b can be charged to a negative high voltage.

  The solenoid valve control unit 512 opens the selected solenoid valve among the solenoid valves 11 and closes the other solenoid valves. That is, since the work 3 is conveyed in a direction orthogonal to the paper surface of FIG. 1 (left and right direction in FIG. 2), the opening and closing is controlled according to the lateral width of the work 3 (that is, the width in the left and right direction in FIG. 1). Therefore, oil can be applied to the region corresponding to the width of the workpiece 3.

  The motor control unit 513 controls the rotation angle and rotation speed of the pump 15 by controlling the rotation angle and rotation speed of the servo motor 13. The rotation angle of the pump 15 corresponds to the oil supply amount, and the rotation speed of the pump 15 corresponds to the oil supply speed by the pump 15. Details will be described below.

  When the oil is sprayed onto the work 3 to apply the oil, the oil amount is set, and the oil application time is set according to the conveying speed of the work 3. Accordingly, the rotation angle and rotation speed of the pump 15 are determined according to the oil application amount and the oil application time, and the rotation angle and rotation speed of the servo motor 13 are set so as to match the rotation angle and rotation speed. Control.

  4 is an explanatory diagram showing the relationship between the rotational angle and the rotational speed of the pump 15, FIG. 5 is an explanatory diagram showing the oiling region P1 of the work 3, and FIG. 6 is the amount of oiling, the oiling time and the rotational angle, It is a figure which shows the relationship with a rotational speed. Hereinafter, the control of the pump 15 will be described with reference to FIGS. Now, as shown in FIG. 4, it is assumed that the capacity of the pump 15 is 1 [ml] in one rotation. Therefore, the oil amount can be set by controlling the rotation angle θ of the pump 15. Furthermore, the oiling time t can be set by controlling the rotational speed ω of the pump.

  As shown in FIG. 5, when the work 3 is conveyed in the direction of the arrow Y2 in the drawing and oil is applied to the oiling region P1 (shown by hatching in the drawing) between the positions L1 and L2, As shown in FIG. 5 (a), oil injection is started when the position L1 of the work 3 reaches the position of the nozzle 5, and when the position L2 reaches the position L2 as shown in FIG. What is necessary is just to complete injection. At this time, since it is necessary to apply oil uniformly to the oil application region P1 from the position L1 to the position L2, the time until the position L1 of the workpiece 3 reaches L2 and a predetermined amount of oil are injected. What is necessary is just to match | combine the time required, ie, the rotational speed of a pump. Therefore, in this embodiment, the rotation angle θ and the rotation speed ω of the pump are set as appropriate, and control is performed so that a predetermined amount of oil is applied to the oil application region P1 of the workpiece 3.

  Hereinafter, a specific example will be described with reference to FIG. For example, as shown in [A], when 0.4 [ml] of oil is injected for 0.3 seconds, the rotational angle θ of the pump 15 is set to 144 [deg], and the rotational speed ω is set to 1.33 [ Rotation / second].

  As shown in [B], when 0.5 [ml] of oil is injected for 0.5 seconds, the rotational angle θ of the pump 15 is 180 [deg], and the rotational speed ω is 1 [rotation / second]. What should I do?

  As shown in [C], when 0.6 [ml] of oil is injected for 0.4 seconds, the rotation angle θ of the pump 15 is set to 216 [deg], and the rotation speed ω is set to 1.5 [rotation / rotation]. Seconds].

  As described above, the servo motor 13 can control the rotation angle θ and the rotation speed ω of the pump 15 to apply a predetermined amount of oil to a desired region of the workpiece 3.

  Next, control of the voltage control unit 511 will be described. The voltage control unit 511 sets the voltage applied to the power connector 45 to the first voltage V1 (for example, −40 kV) and the second voltage V2 (for example, −60 kV) that is larger on the negative side than the first voltage V1. Switch to one of the following. Here, the first voltage V1 is set to a voltage at which the oil supplied to the oil reservoirs 31a and 31b is not ejected, and the second voltage V2 is the oil supplied to the oil reservoirs 31a and 31b. Set to voltage. Since the first voltage V1 and the second voltage V2 differ depending on the type of oil, they are appropriately set depending on the oil used. Therefore, the voltage control unit 511 sets the voltage applied to the power supply connector 45 to the first voltage V1 during the oiling interval time (non-oiling time zone) and drives the pump 15 during the oiling time zone. The applied voltage is switched to the second voltage V2 in synchronization with. In this way, oil injection is controlled.

  The reason why the voltage is not set to zero in the interval time and is set to the first voltage V1 is to improve the oil injection response. That is, when the applied voltage is directly increased from zero volts to the second voltage V2, the response is poor and a delay occurs in the oil injection. In order to prevent this, the first time is set at the interval time during standby. A voltage V1 is applied.

  Next, with reference to the flowchart shown in FIG. 7, the process sequence of the oil coating apparatus 100 which concerns on this embodiment is demonstrated.

  First, in step S <b> 11, the solenoid valve control unit 512 opens necessary ones of the plurality of solenoid valves 11. In this process, the electromagnetic valve 11 corresponding to the width of the workpiece is selected according to the input operation of the operator, and the selected electromagnetic valve 11 is opened.

  In step S <b> 12, the voltage control unit 511 applies the first voltage V <b> 1 to the power connector 45.

  In step S13, timing control is executed. That is, it waits until the oil application position of the work 3 reaches the injection position of the nozzle 5.

  In step S14, the voltage control unit 511 switches the voltage supplied to the power connector 45 from the first voltage V1 to the second voltage V2, and the motor control unit 513 drives the servo motor 13 to activate the pump 15. Operate. As a result, as shown in FIG. 6, the pump 15 rotates by a predetermined rotation angle θ at a predetermined rotation speed ω set in advance. The oil sent from the pump 15 is supplied to the nozzle 5 through the oil pipe 9a, the manifold 42, and the electromagnetic valve 11 that is opened. Specifically, the oil is supplied to the oil sumps 31a and 31b shown in FIG. And in step S15, oil is injected toward the workpiece | work 3 from opening part 7a, 7b.

  As shown in FIGS. 4 to 6, the oil injected from the openings 7 a and 7 b is uniformly injected into the oil application region P <b> 1 of the workpiece 3.

  Thereafter, in step S16, the voltage controller 511 switches the voltage supplied to the power connector 45 from the second voltage V2 to the first voltage V1. As a result, oil injection stops.

  In step S17, it is determined whether or not to finish oil application. If not (NO in step S17), interval control is performed in step S18. That is, it waits until the next oiling area arrives. Thereafter, the process returns to step S14.

  On the other hand, when the process ends in step S17 (YES in step S17), the electromagnetic valve 11 is closed in step S19. Thereafter, this process is terminated.

  In this way, in the oil coating apparatus 100 according to the present embodiment, the servo motor 13 controls the rotation angle θ of the pump 15 so that the supply amount of oil (oil-based liquid) becomes a predetermined amount. Accordingly, it is possible to reliably supply the nozzle 5 with a necessary amount of oil for applying oil to the workpiece 3.

  Furthermore, since the servo motor 13 is controlled so that the rotational speed ω of the pump 15 becomes a predetermined rotational speed, the oil application time can be set to be a predetermined time. As a result, a predetermined amount of oil is uniformly sprayed onto the oil application area P1 of the workpiece 3, and even the workpiece 3 conveyed at high speed can be reliably applied with oil.

  In addition, since the first voltage V1 is applied to the oil supplied to the oil reservoirs 31a and 31b and the oil voltage is switched to the second voltage V2 at the time of oil injection, the response of oil injection can be improved.

  As mentioned above, although the oil coating apparatus and the oil coating method of this invention were demonstrated based on embodiment of illustration, this invention is not limited to this, The structure of each part is arbitrary structures which have the same function. Can be replaced with something.

3 Work 5 Nozzle 7a, 7b Opening 9a, 9b Oil piping 11 Solenoid valve 13 Servo motor 15 Pump 17 Oil tank (reservoir)
23 Slit 25 Shim 27 Nozzle Head 27a, 27b Plate 29 Supply Port 31a, 31b Notch 33a, 33b Protrusion 39 Thickness 42 Manifold 44 Circulating Electromagnetic Valve 45 Power Connector 49 Power 51 Control Device 61 Carriage 100 Oiling Device 511 Voltage control unit 512 Solenoid valve control unit 513 Motor control unit d1 Opening width P1 Oiling region V1 First voltage V2 Second voltage θ Rotation angle ω Rotation speed

Claims (3)

In the oil coating apparatus that intermittently ejects the oil-based liquid by repeating the injection time zone for ejecting the oil-based liquid from the nozzle head and the stop time zone for stopping the injection,
From a reservoir that stores the oil-based liquid, a pump that sends the oil-based liquid;
A drive motor for driving the pump to supply the oil-based liquid in the reservoir to the nozzle head;
A control unit for controlling the drive of the drive motor,
The controller is
Set the rotation angle and rotation speed of the pump based on the oil application amount and oil application time of the oil-based liquid,
In the stop time period, the drive motor is stopped,
An oiling apparatus , wherein the drive motor is controlled to rotate at the set rotation speed and the set rotation angle during the injection time period . A voltage control unit for applying a negative high voltage to the oil-based liquid;
The voltage control unit sets the applied voltage as the first voltage before the start of rotation of the pump, and applies a second voltage higher than the first voltage to the negative side in synchronization with the start of rotation. The oil coating apparatus according to claim 1. In an oil coating method for intermittently injecting an oil-based liquid by repeating an injection time zone for injecting oil-based liquid from a nozzle head and a stop time zone for stopping injection,
Supplying the oil-based liquid stored in the storage unit by driving a pump to the nozzle head;
Stopping the pump during the stop time period, and controlling the drive of the pump so as to rotate at a preset rotation speed and a preset rotation angle during the injection time period;
An oiling method characterized by comprising:

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